Why the same product has different ingredients in the EU and US

Scan a shampoo bought in Paris and the same shampoo bought in Chicago and the ingredient lists will not match. Sometimes the difference is only wording. Sometimes it is a different formula under the same name. This post explains the rules behind the gap and shows what it looks like across the products we have checked.

Where our products come from

Our data is European-heavy: 5,304 products are sold in France, 1,666 in Germany, 747 in Spain, 336 in the United Kingdom, against 1,282 sold in the United States. That mix lets us compare the two label styles directly.

Difference one: the words

EU labels use INCI names in their Latin or standardized form. US labels use the same INCI system but allow common English names. The result:

• Aqua versus Water. Among our US-sold products, 911 write Water and 528 write Aqua. Among products sold in France, Germany, Spain, Italy, the Netherlands and the UK, 6,885 write Aqua and 2,535 write Water.
• Parfum versus Fragrance. US: 562 Fragrance, 360 Parfum. EU: 5,769 Parfum, 1,984 Fragrance.
• Aroma versus Flavor in toothpaste. Colgate Max Fresh sold in France lists Aroma; the US version lists Flavor, and the order of a few ingredients changes too.

Our checks read all of these as the same ingredient. Water is Aqua, Fragrance is Parfum, and a check does not change its answer because of the language on the pack.

Difference two: the allergen lines

The EU requires 26 fragrance allergens (more than 80 from 2026) to be named on the label when they exceed a threshold. The US has no such rule. In our data, 47 percent of EU-sold products name limonene or linalool; only 23 percent of US-sold products do. That does not mean US products contain half as much fragrance. It means the US label is allowed to hide the components inside the word Fragrance.

For a fragrance free check this matters. An EU label gives us more to read, and our not sure rate is lower on EU products for that reason.

Difference three: what is banned

The EU Cosmetics Regulation lists over 1,700 substances in its Annex II of prohibited ingredients, plus hundreds more restricted in Annex III. US federal law prohibits or restricts eleven. That gap is the origin of most "banned in Europe, allowed in America" headlines.

The gap is real but often overstated, because many Annex II entries are industrial chemicals nobody would put in a cream anyway. The differences that actually show up on labels are narrower:

• Methylisothiazolinone is banned in EU leave-on products since 2017. In our data it appears at roughly the same rate in US-sold (58 of 1,282) and EU-sold products (404 of 8,695), because in both markets it now lives almost entirely in rinse-off products.
• Formaldehyde releasers such as DMDM hydantoin are restricted in the EU and appear in 12 US-sold and 128 EU-sold products in our data, so again the shelves look more alike than the headlines suggest.
• Parabens: propyl and butyl are capped at 0.14 percent in the EU and banned in leave-on nappy products; the US has no cap. Our data shows parabens in 5.1 percent of US-sold products and 3.9 percent of EU-sold ones.
• Lilial (butylphenyl methylpropional) has been banned in the EU since 2022 and is still allowed in the US.

In 2022 the US passed the Modernization of Cosmetics Regulation Act (MoCRA), which for the first time requires facility registration, product listing and adverse event reporting. It did not add an ingredient ban list, so the Annex II gap remains.

Difference four: the formula itself

Sometimes the name is the only thing shared. Our data has several pairs where the same brand and product name appear in different countries with different formulas. A few:

• Two Vaseline Lip Therapy listings, one sold across Australia, France and the UK, the other UK only, have different formulas: sweet almond oil and rose oil in the first, aloe extract and isopropyl myristate in the second.
• Old Spice Swagger in the US and Morocco is an antiperspirant stick built on aluminum sesquichlorohydrate and cyclopentasiloxane; Old Spice Swagger in France is a body wash built on sodium laureth sulfate. Same name, different product.
• Neutrogena Hydro Boost in Germany and in Switzerland put dimethicone in different positions and use different preservative systems.

Reasons include local regulation, local ingredient supply, local preferences (Americans like more foam and more fragrance), and the simple fact that regional teams reformulate on different schedules.

What this means for you

• A verdict is for the pack in front of you. If you buy abroad, search the product again; the slug in our address often includes the size or region that identifies the version.
• Do not assume the EU version is "cleaner". Sometimes it is, sometimes the difference is a word.
• If you react to an ingredient, learn its names in both systems: Aqua and Water, Parfum and Fragrance, Cera Alba and Beeswax, Paraffinum Liquidum and Mineral Oil.

FAQ

Is a product sold in Europe safer than the US version?

Not automatically. The EU bans more substances, but most of them never appeared in cosmetics anyway. Compare the actual lists.

Why does my US label not show allergens like Limonene?

Because US law does not require them. The substance may still be present inside the word Fragrance.

Does Water mean a different ingredient from Aqua?

No. They are the same ingredient under two naming conventions. Our checks treat them identically.

Which version does your site show?

Whichever version was scanned and submitted. When both exist, they appear as separate products with separate verdicts.